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Wind Energy 101: How Wind Farms Generate Electricity
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We all remember last year’s, Abbott-led, coal-fired lynch mob which tried to convince us that wind farms – in all their majestic and renewable glory – were ‘visually awful’. Obviously this is untrue and we’re glad they’ve moved on. Now that that dust has settled, however, we thought it’d be a good chance to bring the wind farm conversation back, setting visuals aside.
Wind power is energy that’s generated by harnessing the power of the wind through wind turbines. It’s a great alternative to burning fossil fuels (like coal), because wind is clean, doesn’t produce greenhouse gas emissions and there’s lots of it. At present, it’s the cheapest large-scale renewable energy source (Clean Energy Council).
Wind turbines are around 120 metres tall with blades that span around 45 metres. Their height lets the turbines capture stronger winds, but they can start generating electricity in light breezes (around 14 km/hour), reaching full output in winds of around 57 km/hour (Meridian Energy Australia). The turbines capture wind energy within the area swept by their spinning blades. The blades, in turn, drive a generator that produces electricity to export to the grid. At full capacity, wind turbines can generate thousands of megawatt (MW) hours of electricity.
Wind farms are simply areas of land dedicated to generating energy, where groups of individual wind turbines are connected to the electricity grid. The land between the turbines is sometimes used for agricultural purposes too. A large-scale wind farm might entail hundreds of wind turbines over a space of hundreds of square kilometres. To give you an idea of just how big wind farms can be, Gansu Wind Farm in China, produced about 6,000 MW of power in 2012 from more than 3,500 individual wind turbines.
Australian wind farms produced more than 30 per cent of the country’s clean energy in 2014 and wind power made up 4.2 per cent of Australia’s total electricity during the year (Clean Energy Council). Our national Renewable Energy Target (‘RET’) provides an incentive to build low-cost renewable energy projects, which means, given that wind power is currently the cheapest source of large-scale renewable energy, it’s likely wind power will be the leading renewable energy technology supported by the RET in Australia over the next decade (Clean Energy Council).
Powershop’s Wind Farms
We’re backed by a 100 per cent renewable energy company Meridian Energy, which operates two wind farms in Australia. Our most recent project is the 64-turbine Mt Mercer Wind Farm just outside of Ballarat, which produces enough energy to power the entire Ballarat population – that’s around 80,000 households.
We also operate the 35-turbine Mt Millar Wind Farm in South Australia. Our Mt Millar farm is positioned on an escarpment on an elongated site (about 7 kilometres long), which maximises the turbines’ exposure to the wind. Mt Millar can generate up to 70 MW of electricity – enough to power around 36,000 households.
Mt Mercer and Mt Millar wind farms produce more renewable energy than the total energy used by all of Powershops’ customers. By choosing Powershop as your electricity retailer, your money is going to a company that only invests in renewable energy.
Want to know more?
If you’d like to find out more about Powershop’s wind farms, or if you’re interested in taking a wind farm tour, email email@example.com and we’ll be in touch.